Touch panel

ABSTRACT

A touch panel including a liquid crystal panel, a first polarizer, touch units, and a second polarizer is provided. The liquid crystal panel includes a first substrate, a second substrate, an active array, and a liquid crystal layer. Each of the touch units includes a first electrode extending along a first extending direction and a second electrode extending along a second extending direction. The first electrode includes two of first touch electrodes electrically connected to each other. Each of the first touch electrodes has a first deviation amount in the second extending direction. The second electrode includes two of second touch electrodes electrically connected to each other. Each of the second touch electrodes has a second deviation amount in the first extending direction. The two of the second touch electrodes and the two of the first touch electrodes have four overlapping points.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of and claims thepriority benefit of U.S. application Ser. No. 16/729,510, filed on Dec.30, 2019, now allowed, which claims the priority benefit of Taiwanapplication serial no. 108130455, filed on Aug. 26, 2019. The entiretyof each of the above-mentioned patent applications is herebyincorporated by reference herein and made a part of this specification.

TECHNICAL FIELD

The invention relates a touch panel, and more particularly, relates to atouch panel having a touch unit including two first touch electrodes andtwo touch electrodes.

BACKGROUND

With the advancement of technology, the appearance rate of touch panelsin the market has gradually increased, and various related technologieshave also emerged in an endless stream. In certain electronic devices(e.g., mobile phones, tablet computers, and smart watches), a touchpanel and a display panel are often combined together to improve theconvenience of the electronic devices in use.

In general, a touch substrate with touch function is additionallyattached on a surface of the display panel so that the electronic devicecan provide both touch and display functions. For instance, an adhesivelayer is used for bonding the display panel with the touch substrate.However, the electronic devices manufactured in this way will havethicker and heavier modules, and the overall module mechanism strengthwill be weaker.

SUMMARY

The invention provides a touch panel, which can reduce noise whilemaintaining touch signal strength.

At least one embodiment of the invention provides a touch panel. Thetouch panel includes a liquid crystal panel, a first polarizer, a touchdevice, and a second polarizer. The liquid crystal panel includes afirst substrate, a second substrate, an active array, and a liquidcrystal layer. The active array and the liquid crystal layer aredisposed between the first substrate and the second substrate. The firstpolarizer is disposed on the first substrate. The touch device includesa plurality of touch units disposed on the second substrate. A width ofeach of the touch units in a first extending direction is X, and a widthof each of the touch units in a second extending direction is Y. An areaof each of the touch units perpendicularly projected on the secondsubstrate is A. Each of the touch units includes a first electrodeextending along a first extending direction and a second electrodeextending along a second extending direction. The first electrodeincludes two of first touch electrodes electrically connected to eachother. Each of the first touch electrodes has a first deviation amountin the second extending direction. The first deviation amount is greaterthan 0 and less than 0.2Y. An area of the first electrodeperpendicularly projected on the second substrate is approximately 0.07Ato 0.25A. The second electrode includes two of second touch electrodeselectrically connected to each other. Each of the second touchelectrodes has a second deviation amount in the first extendingdirection. The second deviation amount is greater than 0 and less than0.2X.

An area of the second electrode perpendicularly projected on the secondsubstrate is approximately 0.07A to 0.25A. The two of the second touchelectrodes and the two of the first touch electrodes have fouroverlapping points. The second polarizer is disposed on the touch units.

At least one embodiment of the invention provides a touch panel. Thetouch panel includes a liquid crystal panel, a first polarizer, a touchdevice, and a second polarizer. The liquid crystal panel includes afirst substrate, a second substrate, an active array, and a liquidcrystal layer. The active array and the liquid crystal layer aredisposed between the first substrate and the second substrate. The firstpolarizer is disposed on the first substrate. The touch device includesa plurality of touch units disposed on the second substrate. A width ofeach of the touch units in a first extending direction is X, and a widthof each of the touch units in a second extending direction is Y. Each ofthe touch units includes a first electrode extending along a firstextending direction and a second electrode extending along a secondextending direction. The first electrode includes two of first touchelectrodes electrically connected to each other. The second electrodeincludes two of second touch electrodes electrically connected to eachother. The two of the second touch electrodes and the two of the firsttouch electrodes have four overlapping points. A capacitance between thefirst electrode and the second electrode is 0.3 pF to 1.1 pF. The secondpolarizer is disposed on the touch units.

To make the aforementioned more comprehensible, several embodimentsaccompanied with drawings are described in detail as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a top view of a touch panel according to an embodiment of theinvention.

FIG. 1B is a cross-sectional view taken along a section line aa′ of FIG.1A.

FIG. 1C is a top view of a touch unit in FIG. 1A.

FIG. 1D is a cross-sectional view taken along a section line bb′ of FIG.1C.

FIG. 2 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 3 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 4 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 5 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 6 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 7 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 8 is a top view of a touch unit according to an embodiment of theinvention.

FIG. 9 is a top view of a touch unit according to an embodiment of theinvention.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1A is a top view of a touch panel according to an embodiment of theinvention. FIG. 1B is a cross-sectional view taken along a section lineaa′ of FIG. 1A. FIG. 1C is a top view of a touch unit in FIG. 1A. FIG.1D is a cross-sectional view taken along a section line bb′ of FIG. 1C.For descriptive convenience, FIG. 1A omits illustration of certaincomponents in FIG. 1B, and FIG. 1B omits illustration of certaincomponents in a touch device.

Referring to FIG. 1A and FIG. 1B, a touch panel 10 includes a liquidcrystal panel 100, a first polarizer 200, a touch device 300, and asecond polarizer 400.

The liquid crystal panel 100 includes a first substrate 110, a secondsubstrate 120, an active array 130, and a liquid crystal layer 140. Inthis embodiment, the liquid crystal panel 100 further includes a colorfilter element 150.

The first substrate 110 and the second substrate 120 may be made of aglass, a quartz, an organic polymer, a non-transparent/reflectivematerial or other suitable materials.

The active array 130 and the liquid crystal layer 140 are disposedbetween the first substrate 110 and the second substrate 120. In thisembodiment, the active array 130 is disposed between the first substrate110 and the liquid crystal layer 140. The active array 130 is, forexample, a pixel array, and includes a plurality of sub-pixels. Each ofthe sub-pixels includes an active element and a pixel electrodeelectrically connected to the active element. A common electrode isdisposed on the first substrate 110 or the second substrate 120, andcontrols liquid crystal molecules in the liquid crystal layer 140 by anelectric field between the common electrode and the pixel electrode.

The color filter element 150 is disposed on the second substrate 120. Inthis embodiment, the color filter element 150 is located between thesecond substrate 120 and the liquid crystal layer 140, but the inventionis not limited thereto. In other embodiments, the color filter element150 is disposed on the active array 130 to form a color filter on array(COA) structure.

The first polarizer 200 is disposed on the first substrate 110. In thisembodiment, the first substrate 110 is disposed between the firstpolarizer 200 and the active array 130.

The touch device 300 includes a plurality of touch units 310 disposed onthe second substrate 120. In this embodiment, the touch device 300further includes a control circuit 320. In other embodiments, thecontrol circuit 320 is arranged on a flexible printed circuit board, thecontrol circuit 320 is electrically connected to the control circuit 320disposed on the flexible printed circuit board, and other chips orcomponents may also be arranged on the flexible printed circuit board.

Referring to FIG. 1A and FIG. 1C, a width of each of the touch units 310in a first extending direction E1 is X, and a width of each of the touchunits 310 in a second extending direction E2 is Y. In this embodiment,an area of each of the touch units 310 perpendicularly projected on thesecond substrate 120 is A, and the area A is, for example, a product ofthe width X and the width Y. In this embodiment, X is 3 mm to 6 mm, andY is 3 mm to 6 mm. In this embodiment, X and Y are equal to a sensorpitch of the touch units 310.

Each of the touch units 310 includes a first electrode 312 extendingalong the first extending direction E1 and a second electrode 314extending along the second extending direction E2. In this embodiment,the first electrode 312 is a receiver electrode, and the secondelectrode 314 is a transmitter electrode. However, the invention is notlimited this regard. In other embodiments, the first electrode 312 isthe transmitter electrode, and the second electrode 314 is the receiverelectrode. A shape of the first electrode 312 and a shape of the secondelectrode 314 may be identical to or different from each other.

The first electrode 312 includes two of first touch electrodes 3121electrically connected to each other. In this embodiment, the two of thefirst touch electrodes 3121 electrically connected to each other areelectrically connected to the control circuit 320 through the samesignal line 312 a. An area of the first electrode 312 perpendicularlyprojected on the second substrate 120 is approximately 0.07A to 0.25A.In certain embodiments, the first touch electrode 3121 includes aplurality of slits, but the invention is not limited thereto.

The second electrode 314 includes two of second touch electrodes 3141electrically connected to each other. In this embodiment, the two of thesecond touch electrodes 3141 electrically connected to each other areelectrically connected to the control circuit 320 through the samesignal line 314 a. An area of the second electrode 314 perpendicularlyprojected on the second substrate 120 is approximately 0.07A to 0.25A.In certain embodiments, the second touch electrode 3141 includes aplurality of slits, but the invention is not limited thereto.

Referring to FIG. 1C and FIG. 1D, in this embodiment, the first touchelectrode 3121 includes a bridging unit 3122 (illustration of which isomitted in FIG. 1C), and the bridging unit 3122 is disposed at anintersection between the second touch electrode 3141 and the first touchelectrode 3121. In this embodiment, an insulating layer I (illustrationof which is omitted in FIG. 1C) is disposed on the intersection betweenthe second touch electrode 3141 and the first touch electrode 3121, andthe bridging unit 3122 is disposed on the insulating layer I. Thebridging unit 3122 is disposed to allow the first electrode 312 to crossover the second electrode 314. In other embodiments, the second touchelectrode 3141 includes a bridging unit, and the bridging unit isdisposed to allow the second electrode 314 to cross over the firstelectrode 312.

The two of the second touch electrodes 3141 and the two of the firsttouch electrodes 3121 have four overlapping points OP. On each of thefirst touch electrodes 3121, a distance L1 between adjacent two of theoverlapping points OP is 0.4X to 0.6X. On each of the second touchelectrodes 3141, a distance L2 between adjacent two of the overlappingpoints OP is 0.4Y to 0.6Y.

In this embodiment, a capacitance between the first electrode 312 andthe second electrode 314 is 0.3 pF to 1.1 pF. For instance, thecapacitance (Cm) between the first electrode 312 and the secondelectrode 314 is approximately 0.433 pF to 0.434 pF, but the inventionis not limited thereto.

In this embodiment, a parasitic capacitance (Cp) between the firstelectrode 312 and the liquid crystal panel 100 is approximately 0.496pF, and a parasitic capacitance (Cp) between the second electrode 314and the liquid crystal panel 100 is approximately 0.524 pF. However, theinvention is not limited in this regard. In this embodiment, acapacitance (Cp+Cm) on the first electrode 312 is 0.8 pF to 1.5 pF, anda capacitance (Cp+Cm) on the second electrode 314 is 0.8 pF to 1.5 pF.For instance, the capacitance (Cp+Cm) on the first electrode 312 is 0.93pF, and the capacitance (Cp+Cm) on the second electrode 314 is 0.957 pF.

Because the capacitance between the first electrode 312 and the secondelectrode 314 is 0.3 pF to 1.1 pF, it is possible to reduce noise on thefirst electrode 312 and the second electrode 314 while maintaining touchsignal strength. Therefore, the touch panel 10 is not only suitable fortouch control with fingers, but also suitable for touch control with anactive capacitive stylus. In certain embodiments, because thecapacitance on the first electrode 312 is 0.8 pF to 1.5 pF and thecapacitance on the second electrode 314 is 0.8 pF to 1.5 pF, it ispossible to further reduce noise on the first electrode 312 and thesecond electrode 314 and maintain touch signal strength.

The second polarizer 400 is disposed on the touch units 310. In thisembodiment, the touch panel 10 further includes an adhesive layer 500and a hardened layer 600. The adhesive layer 500 and the hardened layer600 are disposed on the second polarizer 400, and the adhesive layer 500is disposed between the hardened layer 600 and the second polarizer 400.In this embodiment, because the capacitance between the first electrode312 and the second electrode 314 is 0.3 pF to 1.1 pF, the hardened layer600 having a thickness thinner than that of a general cover lens may beused. For instance, a thickness of the hardened layer 600 is 80 μm to120 μm. In other words, the touch panel 10 is suitable for a lightweightintegrated touch panel (On-cell Touch Panel-lite). In other embodiments,the hardened layer 600 may also be replaced with a protective glass inthe touch panel.

FIG. 2 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that, the embodiment of FIG. 2 adopts thereference numbers and part of the content in the embodiment of FIG. 1Ato FIG. 1D, where identical or similar reference numbers are used toindicate identical or similar components, and repeated description forthe same technical contents is omitted. The omitted description canrefer to the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 a in FIG. 2 and the touch unit310 in FIG. 1C is that the touch unit 310 a further includes a dummyelectrode 316.

The dummy electrode 316 is separated from the first electrode 312 andthe second electrode 314. In the touch unit 310 a, an area of the dummyelectrode 316 perpendicularly projected on the second substrate(referring to FIG. 1A) is approximately 0.5A to 0.86A. In certainembodiments, the first electrode 312, the second electrode 314 and thedummy electrode 316 are a combination of a transparent conductive oxideand a metal mesh. For instance, at least one of the first electrode 312,the second electrode 314 and the dummy electrode 316 is a multilayerstructure, and is a stack of the transparent conductive oxide and themetal mesh. However, the invention is not limited in this regard. Inother embodiments, the first electrode 312, the second electrode 314 andthe dummy electrode 316 are a transparent conductive oxide. In certainembodiments, the dummy electrode 316 includes a plurality of slits, andthe slits divide the dummy electrode 316 into a plurality of smallfragments. In other words, the dummy electrode 316 disposed between theadjacent two of the second touch electrodes 3141 and between adjacenttwo of the first touch electrodes 3121 includes the small fragments andthe slits that separate the small fragments.

In certain embodiments, the dummy electrode 316 affects the capacitancebetween the first electrode 312 and the second electrode 314. In thisembodiment, the capacitance between the first electrode 312 and thesecond electrode 314 is 0.3 pF to 1.1 pF. For instance, the capacitance(Cm) between the first electrode 312 and the second electrode 314 isapproximately 0.444 pF to 0.46 pF, but the invention is not limitedthereto.

In this embodiment, a parasitic capacitance (Cp) between the firstelectrode 312, the liquid crystal panel 100 and the dummy electrode 316is approximately 0.456 pF, and a parasitic capacitance (Cp) between thesecond electrode 314, the liquid crystal panel 100 and the dummyelectrode 316 is approximately 0.512 pF. However, the invention is notlimited in this regard. In this embodiment, the capacitance (Cp+Cm) onthe first electrode 312 is 0.8 pF to 2 pF, and the capacitance (Cp+Cm)on the second electrode 314 is 0.8 pF to 2 pF. For instance, thecapacitance (Cp+Cm) on the first electrode 312 is 0.9 pF, and thecapacitance (Cp+Cm) on the second electrode 314 is 0.972 pF. FIG. 3 is atop view of a touch unit according to an embodiment of the invention. Itshould be noted that, the embodiment of FIG. 3 adopts the referencenumbers and part of the content in the embodiment of FIG. 1A to FIG. 1D,where identical or similar reference numbers are used to indicateidentical or similar components, and repeated description for the sametechnical contents is omitted. The omitted description can refer to theforegoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 b of FIG. 3 and the touch unit310 of FIG. 1C is that the first touch electrode 3121 of the touch unit310 b has a first deviation amount D1 in the second extending directionE2, and the second touch electrode 3141 has a second deviation amount D2in the first extending direction E1.

In this embodiment, the second touch electrode 3141 includes a bridgingunit (not illustrated), and the bridging unit is disposed to allow thesecond electrode 314 to cross over the first electrode 312.

In this embodiment, the area of the first electrode 312 perpendicularlyprojected on the second substrate is approximately 0.07A to 0.25A(referring to FIG. 1A). A virtual straight line DL1 generated byconnecting the adjacent two of the overlapping points OP on the firsttouch electrode 3121 is substantially parallel to the first extendingdirection E1, and the first touch electrodes 3121 deviate away from thevirtual straight line DL1 starting from both sides of the virtualstraight line DL1. In this embodiment, the first touch electrode 3121has the deviation amount D1 in the second extending direction E2, andthe first touch electrode 3121 has a deviation amount D3 in a fourthextending direction E4. Here, the second extending direction E2 isopposite to the fourth extending direction E4. The deviation amount D1and the deviation amount D3 are greater than 0 and less than 0.2Y. Thedeviation amount D1 and the deviation amount D3 may be identical to ordifferent from each other.

In this embodiment, the area of the second electrode 314 perpendicularlyprojected on the second substrate is approximately 0.07A to 0.25A(referring to FIG. 1A). A virtual straight line DL2 generated byconnecting the adjacent two of the overlapping points OP on the secondtouch electrode 3141 is substantially parallel to the second extendingdirection E2, and the second touch electrodes 3141 deviate away from thevirtual straight line DL2 starting from both sides of the virtualstraight line DL2. More specifically, the second touch electrode 3141has the deviation amount D2 in the first extending direction E1, and thesecond touch electrode 3141 has a deviation amount D4 in a thirdextending direction E3. Here, the first extending direction E1 isopposite to the third extending direction E3. The deviation amount D2and the deviation amount D4 are greater than 0 and less than 0.2X. Thedeviation amount D2 and the deviation amount D4 may be identical to ordifferent from each other.

Because the first touch electrode 3121 has the deviation amount D1 inthe second extending direction E2 and the second touch electrode 3141has the deviation amount D2 in the first extending direction E1, acapacitance distribution of the touch unit 310 b is more uniform.

In this embodiment, the capacitance (Cm) between the first electrode 312and the second electrode 314 is 0.3 pF to 1.1 pF. For instance, thecapacitance (Cm) between the first electrode 312 and the secondelectrode 314 is approximately 0.56 pF to 0.561 pF, but the invention isnot limited thereto.

In this embodiment, the parasitic capacitance (Cp) between the firstelectrode 312 and the liquid crystal panel 100 is approximately 0.665pF, and the parasitic capacitance (Cp) between the second electrode 314and the liquid crystal panel 100 is approximately 0.742 pF. However, theinvention is not limited in this regard. In this embodiment, thecapacitance (Cp+Cm) on the first electrode 312 is 0.8 pF to 1.5 pF, andthe capacitance (Cp+Cm) on the second electrode 314 is 0.8 pF to 1.5 pF.For instance, the capacitance (Cp+Cm) on the first electrode 312 is1.225 pF, and the capacitance (Cp+Cm) on the second electrode 314 is1.303 pF.

FIG. 4 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 3 are also used to describe theembodiment of FIG. 4, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 c in FIG. 4 and the touch unit310 b in FIG. 3 is that the touch unit 310 c further includes the dummyelectrode 316.

The dummy electrode 316 is separated from the first electrode 312 andthe second electrode 314. In the touch unit 310 c, the area of the dummyelectrode 316 perpendicularly projected on the second substrate(referring to FIG. 1A) is approximately 0.5A to 0.86A.

In this embodiment, the capacitance (Cm) between the first electrode 312and the second electrode 314 is 0.3 pF to 1.1 pF. For instance, thecapacitance (Cm) between the first electrode 312 and the secondelectrode 314 is approximately 0.724 pF to 1.099 pF, but the inventionis not limited thereto.

In this embodiment, the parasitic capacitance (Cp) between the firstelectrode 312, the liquid crystal panel 100 and the dummy electrode 316is approximately 0.855 pF, and the parasitic capacitance (Cp) betweenthe second electrode 314, the liquid crystal panel 100 and the dummyelectrode 316 is approximately 0.871 pF. However, the invention is notlimited in this regard. In this embodiment, the capacitance (Cp+Cm) onthe first electrode 312 is 0.8 pF to 2 pF, and the capacitance (Cp+Cm)on the second electrode 314 is 0.8 pF to 2 pF. For instance, thecapacitance (Cp+Cm) on the first electrode 312 is 1.954 pF, and thecapacitance (Cp+Cm) on the second electrode 314 is 1.595 pF.

In certain embodiments, the capacitances (Cp+Cm) on the first electrode312 and the second electrode 314 can be adjusted by setting the dummyelectrode 316 without increasing the areas of the first electrode 312and the second electrode 314. Therefore, even if the capacitances(Cp+Cm) on the first electrode 312 and the second electrode 314 arelarge, the first electrode 312 and the second electrode 314 can stillhave small areas so that noise on the first electrode 312 and the secondelectrode 314 is smaller.

FIG. 5 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 4 are also used to describe theembodiment of FIG. 5, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 d of FIG. 5 and the touch unit310 c of FIG. 4 is that shapes of the first electrode 312 and the secondelectrode 314 of the touch unit 310 d are different from shapes of thefirst electrode 312 and the second electrode 314 of the touch unit 310c. The area A of the touch unit 310 d is less than the area A of thetouch unit 310 c. The touch unit 310 d in FIG. 5 and the touch unit 310c in FIG. 4 are not enlarged and drawn at the same scale.

In this embodiment, the area of the first electrode 312 perpendicularlyprojected on the second substrate is approximately 0.07A to 0.25A(referring to FIG. 1A). In this embodiment, the area of the secondelectrode 314 perpendicularly projected on the second substrate isapproximately 0.07A to 0.25A (referring to FIG. 1A).

In this embodiment, the capacitance (Cm) between the first electrode 312and the second electrode 314 is 0.3 pF to 1.1 pF. For instance, thecapacitance (Cm) between the first electrode 312 and the secondelectrode 314 is approximately 0.542 pF to 0.543 pF, but the inventionis not limited thereto.

In this embodiment, the parasitic capacitance (Cp) between the firstelectrode 312 and the liquid crystal panel 100 is approximately 0.584pF, and the parasitic capacitance (Cp) between the second electrode 314and the liquid crystal panel 100 is approximately 0.634 pF. However, theinvention is not limited in this regard. In this embodiment, thecapacitance (Cp+Cm) on the first electrode 312 is 0.8 pF to 1.5 pF, andthe capacitance (Cp+Cm) on the second electrode 314 is 0.8 pF to 1.5 pF.For instance, the capacitance on the first electrode 312 is 1.127 pF,and the capacitance on the second electrode 314 is 1.176 pF.

FIG. 6 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 5 are also used to describe theembodiment of FIG. 6, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 e in FIG. 6 and the touch unit310 d in FIG. 5 is that the touch unit 310 e further includes the dummyelectrode 316.

The dummy electrode 316 is separated from the first electrode 312 andthe second electrode 314. In the touch unit 310 e, the area of the dummyelectrode 316 perpendicularly projected on the second substrate(referring to FIG. 1A) is approximately 0.5A to 0.86A.

In this embodiment, the capacitance between the first electrode 312 andthe second electrode 314 is 0.3 pF to 1.1 pF. For instance, thecapacitance (Cm) between the first electrode 312 and the secondelectrode 314 is approximately 0.713 pF to 0.853 pF, but the inventionis not limited thereto.

In this embodiment, the parasitic capacitance (Cp) between the firstelectrode 312, the liquid crystal panel 100 and the dummy electrode 316is approximately 0.668 pF, and the parasitic capacitance (Cp) betweenthe second electrode 314, the liquid crystal panel 100 and the dummyelectrode 316 is approximately 0.721 pF. However, the invention is notlimited in this regard. In this embodiment, the capacitance (Cp+Cm) onthe first electrode 312 is 0.8 pF to 2 pF, and the capacitance (Cp+Cm)on the second electrode 314 is 0.8 pF to 2 pF. For instance, thecapacitance on the first electrode 312 is 1.521 pF, and the capacitanceon the second electrode 314 is 1.434 pF.

FIG. 7 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 6 are also used to describe theembodiment of FIG. 7, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 f of FIG. 7 and the touch unit310 e of FIG. 6 is that shapes of the first electrode 312 and the secondelectrode 314 of the touch unit 310 f are different from shapes of thefirst electrode 312 and the second electrode 314 of the touch unit 310e.

In this embodiment, a sensor pitch of the touch unit 310 f (e.g., thewidth X and the width Y) is greater than 4.5 mm.

Two of the second touch electrodes 3141 and three of the first touchelectrodes 3121 have six overlapping points OP. On each of the firsttouch electrodes 3121, the distance L1 between adjacent two of theoverlapping points OP is 0.4X to 0.6X. On each of the second touchelectrodes 3141, the distance L2 between adjacent two of the overlappingpoints OP is 0.2Y to 0.4Y, and more preferably, 0.33Y.

In this embodiment, the first touch electrode 3121 has the deviationamount D1 in the second extending direction E2, and the first touchelectrode 3121 has the deviation amount D3 in the fourth extendingdirection E4. The deviation amount D1 and the deviation amount D3 aregreater than 0 and less than 0.15Y.

Because the first electrode 312 includes three or more of the firsttouch electrodes 3121 electrically connected to each other, touchuniformity and touch accuracy of the touch panel can be improved.

FIG. 8 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 6 are also used to describe theembodiment of FIG. 8, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 g of FIG. 8 and the touch unit310 e of FIG. 6 is that shapes of the first electrode 312 and the secondelectrode 314 of the touch unit 310 g are different from shapes of thefirst electrode 312 and the second electrode 314 of the touch unit 310e.

In this embodiment, a sensor pitch of the touch unit 310 g (e.g., thewidth X and the width Y) is greater than 4.5 mm.

Three of the second touch electrodes 3141 and two of the first touchelectrodes 3121 have six overlapping points OP. On each of the firsttouch electrodes 3121, the distance L1 between adjacent two of theoverlapping points OP is 0.2X to 0.4X, and more preferably, 0.33X. Oneach of the second touch electrodes 3141, the distance L2 betweenadjacent two of the overlapping points OP is 0.4Y to 0.6Y.

In this embodiment, the second touch electrode 3141 has the deviationamount D2 in the first extending direction E1, and the second touchelectrode 3141 has the deviation amount D4 in the third extendingdirection E3. The deviation amount D2 and the deviation amount D4 aregreater than 0 and less than 0.15X.

Because the second electrode 314 includes three or more of the secondtouch electrodes 3141 electrically connected to each other, touchuniformity and touch accuracy of the touch panel can be improved.

FIG. 9 is a top view of a touch unit according to an embodiment of theinvention. It should be noted that the reference numerals and a part ofthe contents in the embodiment of FIG. 8 are also used to describe theembodiment of FIG. 9, in which the same reference numerals are used torepresent identical or similar elements, and thus descriptions of thesame technical contents are omitted. The omitted description can referto the foregoing embodiment, which is not repeated hereinafter.

The difference between a touch unit 310 h of FIG. 9 and the touch unit310 g of FIG. 8 is that shapes of the first electrode 312 and the secondelectrode 314 of the touch unit 310 h are different from shapes of thefirst electrode 312 and the second electrode 314 of the touch unit 310g.

In this embodiment, a sensor pitch of the touch unit 310 h (e.g., thewidth X and the width Y) is greater than 4.5 mm.

Three of the second touch electrodes 3141 and three of the first touchelectrodes 3121 have nine overlapping points OP. On each of the firsttouch electrodes 3121, the distance L1 between adjacent two of theoverlapping points OP is 0.2X to 0.4X, and more preferably, 0.33X. Oneach of the second touch electrodes 3141, the distance L2 betweenadjacent two of the overlapping points OP is 0.2Y to 0.4Y, and morepreferably, 0.33Y.

In this embodiment, the first touch electrode 3121 has the deviationamount D1 in the second extending direction E2, and the first touchelectrode 3121 has the deviation amount D3 in the fourth extendingdirection E4. The deviation amount D1 and the deviation amount D3 aregreater than 0 and less than 0.15Y. In this embodiment, the second touchelectrode 3141 has the deviation amount D2 in the first extendingdirection E1, and the second touch electrode 3141 has the deviationamount D4 in the third extending direction E3. The deviation amount D2and the deviation amount D4 are greater than 0 and less than 0.15X.

Because the first electrode 312 includes three or more of the firsttouch electrodes 3121 electrically connected to each other and thesecond electrode 314 includes three or more of the second touchelectrodes 3141 electrically connected to each other, touch uniformityand touch accuracy of the touch panel can be improved.

Although the present disclosure has been described with reference to theabove embodiments, it will be apparent to one of ordinary skill in theart that modifications to the described embodiments may be made withoutdeparting from the spirit of the disclosure. Accordingly, the scope ofthe disclosure will be defined by the attached claims and not by theabove detailed descriptions.

What is claimed is:
 1. A touch panel, comprising: a plurality of touchunits, disposed on a substrate, wherein a width of each of the touchunits in a first extending direction is X, a width of each of the touchunits in a second extending direction is Y, an area of each of the touchunits perpendicularly projected on the substrate is A, and each of thetouch units comprises: a first electrode, extending along the firstextending direction, and comprising two of first touch electrodeselectrically connected to each other, wherein each of the first touchelectrodes has a first deviation amount in the second extendingdirection, and the first deviation amount is greater than 0 and lessthan 0.2Y, wherein an area of the first electrode perpendicularlyprojected on the substrate is approximately 0.07A to 0.25A; and a secondelectrode, extending along the second extending direction, andcomprising two of second touch electrodes electrically connected to eachother, wherein each of the second touch electrodes has a seconddeviation amount in the first extending direction, and the seconddeviation amount is greater than 0 and less than 0.2X, wherein an areaof the second electrode perpendicularly projected on the substrate isapproximately 0.07A to 0.25A, wherein the two of the second touchelectrodes and the two of the first touch electrodes have fouroverlapping points, wherein each of the first electrode and the secondelectrode comprises a transparent conductive oxide.
 2. The touch panelaccording to claim 1, wherein a capacitance between the first electrodeand the second electrode of each of the touch units is 0.3 pF to 1.1 pF.3. The touch panel according to claim 1, wherein the first electrodecomprises three or more of the first touch electrodes electricallyconnected to each other or the second electrode comprises three or moreof the second touch electrodes electrically connected to each other. 4.The touch panel according to claim 1, further comprises: a liquidcrystal panel, wherein the touch units are disposed above the liquidcrystal panel, and a total value of a mutual capacitance between thefirst electrode and the second electrode and a parasitic capacitancebetween the first electrode and the liquid crystal panel is 0.8 pF to1.5 pF, and a total value of a mutual capacitance between the firstelectrode and the second electrode and a parasitic capacitance betweenthe second electrode and the liquid crystal panel is 0.8 pF to 1.5 pF.5. The touch panel according to claim 1, wherein on each of the firsttouch electrodes, a distance between adjacent two of the overlappingpoints is 0.4X to 0.6X.
 6. The touch panel according to claim 1, whereinon each of the second touch electrodes, a distance between adjacent twoof the overlapping points is 0.4Y to 0.6Y.
 7. The touch panel accordingto claim 1, wherein X is 3 mm to 6 mm, and Y is 3 mm to 6 mm.
 8. Thetouch panel according to claim 1, further comprises: a liquid crystalpanel, wherein the touch units are disposed above the liquid crystalpanel, and wherein each of the touch units further comprises: a dummyelectrode, separated from the first electrode and the second electrode,wherein a capacitance between the first electrode and the secondelectrode is 0.3 pF to 1.1 pF, a total value of a mutual capacitancebetween the first electrode and the second electrode, a parasiticcapacitance between the first electrode and the liquid crystal panel,and a parasitic capacitance between the first electrode and the dummyelectrode is 0.8 pF to 2 pF, and a total value of a mutual capacitancebetween the first electrode and the second electrode, a parasiticcapacitance between the second electrode and the liquid crystal panel,and a parasitic capacitance between the second electrode and the dummyelectrode is 0.8 pF to 2 pF.
 9. The touch panel according to claim 8,wherein in each of the touch units, an area of the dummy electrodeperpendicularly projected on the substrate is approximately 0.5A to0.86A.
 10. The touch panel of claim 1, further comprises: a polarizer,disposed on the touch units; and a hardened layer, disposed on thepolarizer, and a thickness of the hardened layer is 80 μm to 120 μm. 11.A touch panel, comprising: a plurality of touch units disposed on asubstrate, wherein a width of each of the touch units in a firstextending direction is X, a width of each of the touch units in a secondextending direction is Y, and each of the touch units comprises: a firstelectrode, extending along the first extending direction, and comprisingtwo of first touch electrodes electrically connected to each other; anda second electrode, extending along the second extending direction, andcomprising two of second touch electrodes electrically connected to eachother, wherein the two of the second touch electrodes and the two of thefirst touch electrodes have four overlapping points, wherein a mutualcapacitance between the first electrode and the second electrode is 0.3pF to 1.1 pF.
 12. The touch panel according to claim 11, wherein an areaof each of the touch units perpendicularly projected on the substrate isA, an area of the first electrode perpendicularly projected on thesubstrate is approximately 0.07A to 0.25A, and an area of the secondelectrode perpendicularly projected on the substrate is approximately0.07A to 0.25A.
 13. The touch panel according to claim 12, wherein thefirst electrode comprises three or more of the first touch electrodeselectrically connected to each other or the second electrode comprisesthree or more of the second touch electrodes electrically connected toeach other.
 14. The touch panel according to claim 11, wherein each ofthe first touch electrodes has a first deviation amount in the secondextending direction, the first deviation amount is greater than 0 andless than 0.2Y, each of the second touch electrodes has a seconddeviation amount in the first extending direction, and the seconddeviation amount is greater than 0 and less than 0.2X.
 15. The touchpanel according to claim 11, wherein on each of the first touchelectrodes, a distance between adjacent two of the overlapping points is0.4X to 0.6X.
 16. The touch panel according to claim 11, wherein on eachof the second touch electrodes, a distance between adjacent two of theoverlapping points is 0.4Y to 0.6Y.
 17. The touch panel according toclaim 11, wherein X is 3 mm to 6 mm, and Y is 3 mm to 6 mm.
 18. Thetouch panel according to claim 11, further comprises: a liquid crystalpanel, wherein the touch units are disposed above the liquid crystalpanel, and wherein each of the touch units further comprises: a dummyelectrode, separated from the first electrode and the second electrode,wherein a capacitance between the first electrode and the secondelectrode is 0.3 pF to 1.1 pF, a total value of a mutual capacitancebetween the first electrode and the second electrode, a parasiticcapacitance between the first electrode and the liquid crystal panel,and a parasitic capacitance between the first electrode and the dummyelectrode is 0.8 pF to 2 pF, and a total value of a mutual capacitancebetween the first electrode and the second electrode, a parasiticcapacitance between the second electrode and the liquid crystal panel,and a parasitic capacitance between the second electrode and the dummyelectrode is 0.8 pF to 2 pF.
 19. The touch panel according to claim 18,wherein in each of the touch units, an area of the dummy electrodeperpendicularly projected on the substrate is approximately 0.5A to0.86A.
 20. The touch panel of claim 11, further comprising: a polarizer,disposed on the touch units; and a hardened layer, disposed on thepolarizer, and a thickness of the hardened layer is 80 μm to 120 μm.